I apologize if I am beating a dead horse, but I had a sudden wave of buyers remorse and I was hoping somebody with more MacBook "experience" than me could give me a hand. I ordered a 13" MacBook Pro (mid-2012) base model and upgraded the ram. I got an awesome deal for an Intel 330 180GB ssd which I was planning to put into it. The reason i went with the Pro over the Air was for 2 concerns:Upgradability and Durability - I thought that the Pro would be a more viable option for me over the span of 3-4 years (minimum) that I will own it. I am a student and I have my laptop with me on most days. I use it for the general stuff along with some light computational work (Mostly mathematica and some modeling....I am a Physics/Geology Major). I thought that the air may not me "sturdy" enough as I do get heavy use out of my laptop. Therefore I played it safe and went with the pro. I have owned the classic early-2008 white MacBook for over 4 years and I usually did not find the weight too bothersome. Is my logic reasonable? My MBP is in the mail but the air is looking mighty sexy right now. Any thoughts?